Sewing machine



Feb. 18, 1941. F. sQuARclA SEWING MACHINE Filed Aug'. 10, 1939 4 Sheets-Sheet 1 INVENTO M/VKJI/nxcm I ATTORNEY w- Q m um, Nbr E? m o f-. E ev im @v Feb. 18, 1941. F. sQuARclA Y 'SEWING MACHINE 'Filed Aug. 10, 1939 4 Sheets-Sheet 2 /twluhtui INVEN-roR /AA/k Jbl/4R04 ATTORNEY Feb. 18, 1941. l--QsQLlARcIAY 2,232,412

SEWING MACHINE Filed Aug. 1o. 1959 4-sneets-sne'et 3 Feb. 18, 1941. 1f.; SQUARCIA 2,232,412

' sEwINGMAcHINE Filed Aug. 1o, 19549 4 `shnssheet 44 fhri? m .i|...l. Y RA. Y OW .,E. @JMW W n .o 1 1 NNE R QM af mmf .v/a. .n 1 1 1 NNW a m, d H Q, A /l .SM/wi IN. 1%. 1

STATES SEWING MACHINE l 'Frank squarcia, North Plainfield, N J. elimination August 1o, 1939, serial No. acacia [is oni.

, This invention relates to sewing machines, and is more particularly directed toward sewing ma .chnes of the type using waxed or glued threads `such as employed in sewing soles on shoes. w

threads, one a machine thread operated by the needle and drawn through a wax container so that; waxed thread is applied to the lowen side of the work, and the second a waxed bobbin thread lll which is applied to the top of the work. In the ordinary procedure the operator passes raw thread from a large spool through a heated wax pot and winds it onto a comparatively small metal bobbin. This bobbin is inserted into a rotary shuttle which l is kept hot during the operation of the machine.

The amount of thread which can be stored on one of these bobbins is verysmall, and hence the 'o amount of work which an operator can do with` the machine without stoppingto replace, reheat and perhaps rewind bobbins is therefore limited. This frequent replacement of bobbins with time consumed in heating them so that they can bev used is a considerable handicap to the output of the operator.

2B The present invention contemplates a sewing l the wax container are'constructed to form a unitary reciprocable shuttle which is passed back and forth by a sewing position, while other mechanism operated in timed relation to the shuttle operates the needle, picks up the machine thread from the needle, passes it above the shuttle where- .upon it is released and passed down 'by the other end of the shuttle, so that it can be drawn into the work by the usual tightening mechanism.

, A further object ofv the inventionis toA provide `a heated guide along which the shuttle is caused to reciprocate so that the wax container and i, hobbin thread can be kept hot.

A further object of the invention is to provide a novel arrangement ot shuttle comprising the spool support, the wax container and suitable guidesfor passing the hobbin thread from the spool `through the wax container, and suitable tensioning and guiding mechanism so that it will be properly delivered to the work, and to arrange ythese parts so that a new spool of thread `can be readily inserted and threaded through the wax u container.V-v 4 A :further object of the present invention is to provide means for positively controlling the pov sitlon of the shuttle at all times and yet permit Shoe machines of this general type employ two the loop of machine thread to pass down by the driven end of the shuttle.

Other and further objects of the invention will Iappear as the description proceeds.

'Ihe accompanying drawings show, for purposes f 5 of illustrating the present invention, one of the many embodiments in which the invention may take form, it being'understood that the 'drawings are illustrative of the invention rather than limiting the same. 10

In these drawings: g

Figure 1 is a front elevational view taken in the direction of the arrow I of Figure 3 with 'parts broken away and parts in section, and showing the shuttle and operating parts in the left 15 hand position just before the needle thread has lbeen lifted;

Figure 2 is a view similar to Figure l with the shuttle in the right hand position where it has passed through the loop ofthe needle or machine 20 thread' and the latter has been released;

Figure 2a is a fragmentary view taken from the rear showing the partsk in the 'same position as Figure 2; i

Figure 2b isa fragmentary diagrammatic view 25 `with the parts in the position of Figure 2 showing the path of the released machine thread;

Figure 3 is an elevational view taken from the left of Figures 1 and 2 andshowing the rear end of the shuttle and its operating mechanism; f 30 Figure 4 is an elevation view with parts in section and taken from the right of Figures 1 and 2; Figure 5 is an enlarged sectional view taken on the line 5-5 of Figures 4 and 10 showing the e spool holder, the thread guides and the wax con- 35 tainer, the` latter being in the lowered position;

Figureiis a view taken in the direction o! the arrow 6 of Figure 5 showing the spool holder and certain of the thread guides;

Figure 7 is an elevational view taken from the 4 left ofyFigure 5 as indicated by the arrow 1; Figure 8 is an inverted plan view of the shuttle; i Figure 9 is a fragmentary-sectional viewon the line 9-9 of Figures 2 and 5;

Figure 10 is a fragmentary `sectional view on 45 the line lll- I0 of Figure 5;

Figure 11 is a diagrammatic View illustrating` the thread guides of the shuttle; and l Figure 12 is a diagrammatic view illustrating the timing relation of the mechanisms employed. 50

The usual horizontal power shaft of the sewing machine is indicated at I0 and fixed brackets are indicated at Il, Figure 3, and at l2, Figure 4. These brackets support an obliquely extending back plate i3 and a front plate I4 generallyv parallel therewith and secured to it by means of bolts I5. The brackets II and I2 also support an obliquely disposed longitudinally extending bar I6 with a T-shaped lower edge, as indicated at I1.

A suitable cam, not shown, but mounted on the shaft i0 actuates a rocker arm |8 back and forth with a suitable rest period at each end of the stroke. The end of the arm is bifurcated, as indicated at I9, to receive a pin 20 secured to a slide 2| guided in verticalgrooves 22 in the plates I3 A shaft 38 which passes through arecess 3| opening toward the right, as will be apparent from Figure 9. The shaft 3|) flxedly carries two annular members 32 and 33 disposed in the recess 3| each having inwardly facing annular flanges 34 and transversely extending notches 35. The rear end of the shaft 30 is squared, as indicated at 36, Figure 2a. At the left of the machine is a downwardly extending arm 31 having a slot 38 t0 receive a bar 39. A leaf spring 40 urges the left end of the bar upwardly. The other end of the bar slopes as indicated at 39', is provided with a .leaf spring'4I bearing on an abutment 42 so as to support the bar 39, and with a slot 43 for a pin 441. The squared end 36 on the end of the shaft 3|) and the bar 39 cooperate to assure that the parts carried by the shaft 30 will be turned a quarter of a revolution when the machine thread is tightened. This will be described below.

The slider 29, through the medium of the toothed rotary members 32 and 33, isl coupled with a shuttle designated generally by S and shown in detail in Figures 5 to 11, inclusive. As here shown the shuttle comprises a spool holder and a wax container 5|. The shuttle has a T-slot 52 to ride along the grooved lower edge I1 of the guide I6. The wax container also has a T-shaped slot 53 so that it can similarly ride along the groove I1. The spool container 58 has arcuate grooves 54 which. receive the segments of the rotary members 32 and 33 and extend far enough so that one segment will enter the groove before lthe other segment has passed from it. Hence the shuttle is always connected to its reciprocating means.

The spool container', as shown in Figure 5, has a chamber 55 adapted to receive a commercial spool of raw sewing thread, as indicated at 56. This spool of thread is received on a flanged tube 51 which in turn is supported on a shaft or spindle 58 secured at its inner end to the container. The

-lower right hand corner of the container 58 Ais provided with a transversely extending hinge pin 59 on which is secured a bridging member .60 which is adapted to be swung down to the position shown in Figure 5 to permit inserting the spool, or swung up to the position of Figures l and 6 to support the spool and provide thread guides. It has a bearing hole 6| to ilt over the end of the shaft 58.

It is slotted as indicatedat 62 vand 63 and a pin 64 extends across these slots.

Two arms 65 and 66 are pivoted to the left end of the spool holder, as indicated at 61, and support the wax container 5I so that it can be moved at IDI which actuates the fingers.

from the position of Figures 1 and 2 down to the position of Figure 5. The wax' container is of generally triangular shape in horizontal cross section. as will appear from Figure 8, and has a tapered or V-shaped front end 5| to facilitate spreading the loop of machine thread as will be described." The rear wall of the wax container is indicated at 68.

A bell crank shaped lever 69 is pivoted on a shaft 1U`and urged in a counter-clockwise manner by a spring 1|. The upper arm of this bell crank member bears against the lower surface of the bar I6 when the wax container is in the upper position, as shown in Figure 1, and acts to conduct heat from this bar down into the wax container, the bar being heated by electric heaters diagrammatically illustrated at 12.

In order to releasably lock the wax container in the upper position, a portion of the bar |6 is cut away, as indicated' at 13, and a plunger 14 is provided to release the wax container when the shuttle has been brought to the proper position.

.This position is indicated in Figure 5. The

plunger may be actuated to releasing position` by a bell crank 15, Figure 4. Y

The path of the shuttle or bobbin thread B from the spool is indicated in Figure 11. It first passes 'through the slot 63 and over the shaft 64, then down over the shaft 10. guide 16 carried on the lower end of the bell crank 69, and then up past the shaft 10and a spring pressed tensioning device, indicated at 11, Figure 10. It then passes through the slot 62 and over the pin 64 and down through the space behind the wax container and an opening 18 in the bridgmg member adjacent the hinge pin 59.

The lower side of the spool container is pro- It then passes about a vided with two longitudinally extending guide rods 19 and 80 on which is secured a thread tightening slider 8|. Coiled springs`indicated at 82 and 83 urge the thread tightener to the left. The slider 8| carries a pin 84 over which, the thread passes, as indicated in Figure 11. The thread is then down in the proper position to cooperate with the machine or needle thread M. The slider is pulled from the position of Figure 2 to the position of Figure 1 when the shuttle is shifted to the left.'

The sewing needle and awl of usual construction and operated by the usual mechanism are indicated at 99 and 9|, respectively. 'I'hey cooperate witli the work on the work Support in the usual manner. The machine thread M comes up through the wax pot, not shown, and is picked up by the needle in the usual way and a loop pulled up through the work. The loop is spread by the usual finger 92 as indicated in dot and dash lines in Figure 4, and is then picked up by a pair of reciprocating fingers indicated at 93 and 94. The

upward movement of the fingers 93 and 94 is accomplished by a cam-actuated rocker arm 91, Figures l and 2, which operates a slider 98 riding in grooves 99 in plates I3 and I4. The slider 98 is connected by a link |00 with an arm IUI pivoted The path of the fingers is controlled by fixed cams |02 through which rollers |03 pass.'

The fingers 93 and 94 move the machine thread along the path indicated by the heavy dotted lin'e 95, Figure l, to carry the loop up above the shuttle at which time the loop extends across a notch 96 formed in the guide I6 in a positionto be pushed oi the fingers by the projection |86 on the slider29. When this occurs the usual thread tightener comes into action and pulls the bobbin thread down as indicated in. Figure 2b. It passes between the spool container and the slider 29 and enters intov the slots between the teeth on the wheels 32 and 33 and turns these wheels a sufllcient amount to permit the thread to free itself from them. This turn will be approximately a quarter revolution, `and when the shuttle retreats from the position of Figure 2 to the position of Figure 1 the squared end 36- on the shaft 30 will ride along the portion 39' of the bar 39, and this will definitely position the shaft 30 so that the next pair of notches will be in position to receive the loop formed in making the next stitch. If for any reason the sliding of the squared head 36 alongy illustrated in Figure 12. Assuming that the start 1, wherein the shuttle is reciprocated along'a 4. heated guide from which heat is transferred to of the cycle is as indicated, the cams are arranged so that the awl punches the hole in the work `and the shuttle retreats from the position of v Figure 2 to the position of Figure 1 at the same time. The fingers 93 and 94 are then lowered. Next the needle operating mechanism, not shown, functions in the usual manner to'lower and raise the needle. After the needle is raised and lowered the spreader 92 spreads the thread and the ngers 93,and 94 engage it and raise it above the path of the shuttle. The shuttle i and changes being possible, I do not otherwise' limit myself in any way with respect thereto.

What is claimed is: l. A sewing machine having a shuttle including a casing open at one end and having a shaft' adapted to receive a spool of raw bobbin thread from the open end o! the casing and support the spool, a wax container disposed across the'V open end of the casing, guides for directing the thread through the wax container and delivering the waxed bobbinthread into a sewing position, means for heating the wax container, shuttle operating mechanism, and needle and looper mechanism acting on a machine thread to pass the same about the shuttle and form stitches in cooperation 'with the bobbin thread. v

2. A sewing machine such as claimed in claim the wax container. f

3. A sewing machine such as claimed in claim 1, wherein the wax container is movable to -afford. access to the spool storage means and `for refilling ofA wax.-

4. A sewing machine such as claimed in claim 1, wherein the shuttle loperating mechanism has means" for disengaging the thread from the louper mechanism.

5. In a sewing machine, a shuttle including a y casing open at one end and having a shaft adapted to receive a spool of raw thread from fthe open end of the casing vand support the spool, a wax containerdisposed across the open.

endof the casing. `thread guides for directing the thread from the spool through the wax container, a shuttle guide substantially parallel with .i i,

the spool axis and to which the shuttle is slidably secured, and means to reciprocate the shut tle along the shuttle guide.

6. In a sewing machine, a shuttle including casing open at one end and having a-'sha'ft' adapted to receive a spool of raw thread from the i open end ofV the casing and support thespoola wax container disposed across the open endvof the casing, thread guides for directing the thread from the spool through the wax container, a

I heated shuttle guide in thermal contact .with the wax container and disposed substantially parallel- 1 with the spool axis and to which' the shuttle is slidably. secured, and means to reciprocate the shuttle alongthe shuttle guide.

7.,In a sewing machine, a shuttle having a support adapted to hold a spool of thread, a'

shuttle guide substantially parallel with the spool axis and towhich the shuttle is slidably secured, means to reciprocate the shuttle along the shuttle guide, means for lifting the machine thread from the usual needle to form a loopthrough l which the front end ofthe shuttle' may pass, and means for releasing the loop after the shuttle has passed through it and for providing a passage to the rear of the shuttle for the released loop before the shuttle returns without disconnecting theV shuttle from its operating means.

8. A sewing machine suchl as claimed in claim 7, wherein the guide has an opening to receive said loop;

` 9. In a sewing machine, a shuttle having a support adapted to hold a spool of raw thread, a wax container, threadguides for directing the thread from the spool through theA wax container, a shuttle guide substantially parallel with the spool axis and to which the shuttle is slldably secured, means to reciprocate the shuttle along the shuttle guide, movable fingers for lifting the machine thread from the usual needle to form a loop through whichthe shuttle may pass, means for eiecting disengagement of the machine thread from said fingers, and means acting on said thread to pull it down past the rear end of the shuttle without disconnecting the shuttle from its operating means.

Y10. In a sewing machine, a shuttle having a disposed to the rear of the shuttle, means for reciprocating the slider, `anda coupling between the slider and shuttle through which a loop of thread can` be passed without separating the vshuttle from the slider.

11. In a` sewing machine, a straight guide, a shuttle siidably mounted on the guide, and havingan arcuate element adjacent one end, a slider on the guide, and a toothed member rotatablycarried by the slider and having arcuate elements engageable with the' arcuate element on the shuttle and of less arcuate extent than the same to couple the shuttle and slider together while the toothed member is rotated.

12. In a sewing machine, a reciprocatory shuttle adapted to hold a spool ot thread and having thread guides to deliver a bobbin thread for sewing, a supply of machine thread. a needle acting as the machine thread to pass a loop through the work, a device for spreading the loop and removing ittrom the needle.. loop lifting devices,

means todirect the lifting devices into the loop to lift it upwardly past one end of the shuttle and spread the loop. while the shuttle is in one position, means to shiit the shuttle through the loop and for then disengaging the loop from the loop lifting devices, ,and means for drawing the loop down past the other end of the shuttle to tie in the bobbin thread.

13. In a sewing machine. a horizontal shuttle guide bar, a shuttle reciprocably mounted therein, a shuttle operating slider having a driving connection therewith through which a thread loop may be passed, shuttle reciprocating means, a needle operating on a horizontal axis below the bar, a looper having a generally vertical movement for passing a loop of thread from the needleI upwardly about the shuttle, and a loop tightener for drawing the loop downwardly.

14. In a sewing machine, a spool holder having an open end adapted to receive a spool of raw sewing thread and a spindle to support the spool, a normally heated, xedrsupporting guide generally parallel with the spool axis and along which the spool holder may be reciprocated, a wax container having a guiding connection with the ilxed guide and secured to the spool holder for bodily movement therewith, a heat transfer shoe carried by the wax container for transferring heat to the wax, and thread guides for directing thread from the spool through the wax.

15. A sewing machine such as claimed in claim 14, wherein the Wax container is opposite the vand the wax container and a slack take-up device secured to the lower side of the spool holder.

FRANK SQUARCIA. 

